Volcanoes

//**By Mariana** **and** **Stefany**// Volcanoes are formed by many, many, earth quakes and milliones of years. Volcanoes contain magma whitch is also known as lava. Lava is very, very, hot and it is at the center of the earth. Nobody has dug deep enough to reach that magma. But people keep inventing machines to go farther and farther. So this is a little bit about volcanoes but their is much more to explore.

DID YOU KNOW? the name volcanoe has its orgin from the name of Vulcan good of fine in Roman mythology.

After a volcanoe explodes a dust called ash comes all around the island or place it explodes. Ashis normally gray with a dark black look to it.

A volcano is an opening from the earths surface into pods of hot liquid roke beneth the earths crust. The opening allows magma to expand and erupt, where it takes from the lava, ash,cindres or gas. Because the magma is under extream pressure from the over lying crust enjected of this matirial can expand explosivly causing an area of dissruption for several miles wide. Enjected ash, dust, and gas can persiste in the atmospher for weeks or monthes. Eruption in or near the ocean can also generate tsunamis. Valcanic ash is more than just the type of ash you would find after a fire. Though similar in look once the ash has setteled into the ground or objects. Valcanic ash is actually small bits or peices of glass and polverized rock that is created when a volcano erupts. It is also known as tephra.